kicad-libs/modules/qfn.fpd

/* MACHINE-GENERATED ! */

frame paste_pad {
	__0: vec @(SX/2, SY/2)
	__1: vec @(-SX/2, -SY/2)
	pad " " . __0 paste
}

frame paste {
	set x = SE*(xi-SNX/2-0.5)

	set y = SE*(yi-SNY/2-0.5)

	loop xi = 1, SNX

	loop yi = 1, SNY

	__0: vec @(x, y)
	frame paste_pad .
}

frame center {
	set pin = pins+1

	__0: vec @(X2/2, Y2/2)
	__1: vec @(-X2/2, -Y2/2)
	pad "$pin" . __0 bare
	frame paste @
}

frame pad {
	set px = (dx*X1+dy*Y1)/2

	set py = (dy*X1+dx*Y1)/2

	set pin = side*pins/4+i+1

	__0: vec @(px, py)
	__1: vec @(-px, -py)
	pad "$pin" __0 .
	__2: vec @(px, -py)
}

frame side {
	set pos = i-(pins/4-1)/2

	loop i = 0, pins/4-1

	__0: vec @(E*pos*dx, E*pos*dy)
	frame pad .
}

frame pads {
	table
	    { side, dx, dy }
	    { 0, 0, -1 }
	    { 1, 1, 0 }
	    { 2, 0, 1 }
	    { 3, -1, 0 }

	__0: vec @(dy*C1/2, -dx*C2/2)
	frame side .
}

frame index {
}

frame outline {
	table
	    { index, dx, _, dy }
	    { 1, -1, 0, 0 }
	    { 0, 0, 0, -1 }
	    { 0, 1, 0, 0 }
	    { 0, 0, 0, 1 }

	set mx = dx*C1/2

	set my = dy*C2/2

	set cx = mx+my

	set cy = my-mx

	set ax = -Y1/2*dx

	set ay = -Y1/2*dy

	set bx = -Y1/2*dy

	set by = Y1/2*dx

	__0: vec @(cx, cy)
	w: vec .(ax, ay)
	line __0 . w
	__2: vec __0(bx, by)
	line __0 . w
	__1: vec .(index*(ax-bx), index*(ay-by))
	line __2 . w
}

package "QFN$pins-$variant"
unit auto

table
    { pins, variant, X1, Y1, X2, Y2, E, C1, C2, SE, SNX, SNY, SX, SY }
    { 28, "Atmel", 0.24mm, 0.7mm, 2.4mm, 2.4mm, 0.45mm, 4.1mm, 4.1mm, 1mm, 2, 2, 0.8mm, 0.8mm }
    { 28, "MCHP-ML", 0.37mm, 1mm, 4.25mm, 4.25mm, 0.65mm, 5.7mm, 5.7mm, 1mm, 3, 3, 0.65mm, 0.65mm }
    { 28, "SiLabs", 0.25mm, 0.9mm, 3.3mm, 3.3mm, 0.5mm, 4.8mm, 4.8mm, 1.1mm, 3, 3, 0.9mm, 0.9mm }
    { 32, "VHHD-2", 0.26mm, 0.69mm, 3.7mm, 3.7mm, 0.5mm, 5.1mm, 5.1mm, 0.8mm, 3, 3, 0.55mm, 0.55mm }
    { 32, "VHHD-6", 0.26mm, 0.69mm, 3.4mm, 3.4mm, 0.5mm, 5.1mm, 5.1mm, 1.2mm, 2, 2, 0.75mm, 0.75mm }

set w = 5mil

set zone_ratio_35 = ((SNX-1)*SE+SX)*((SNY-1)*SE+SY)/(X2*Y2)

set paste_ratio_20 = SX*SY*SNX*SNY/(X2*Y2)

frame pads @
frame center @
frame outline @
measy side.__0 >> side.__0 3mm
meas side.__0 -> side.__0 -1mm
measy center.__1 >> center.__0 2.3mm
measy pad.__1 >> pad.__1 3.5mm
measy pad.__1 -> pad.__0 1mm
meas pad.__1 -> pad.__2 -1mm
measy paste_pad.__1 -> paste_pad.__0 1.8mm
measy paste.__0 -> paste.__0 -C1
measy paste_pad.__1 >> paste_pad.__0 -C1-1mm